Steel 1330
AISI/SAE 1330 · UNS G13300
1330 (UNS G13300) is a low-alloy manganese steel of about 0.30% C with 1.75% Mn, used as a through-hardening bar and shaft grade; typical values are 415 MPa yield, 690 MPa tensile, 20% elongation and 197 HB.
Values for the HR condition
1330 tempers and conditions
1330 is supplied in 9 conditions, soft to hard. HR is the default FabDigit quotes; the values on this page are for it.
Compare all 9 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
HRDefault Hot rolled | Cheapest stock condition for parts that will be machined and then heat treated by the fabricator. | 415 | 690 | 20 | 13 HRC | 7.8 % IACS |
full anneal ~870 °C, slow cool | Softest, most machinable and most formable condition; use before cold forming or deep machining. | 470 | 705 | 25.5 | 15 HRC | 8 % IACS |
~900 °C, air cooled | Uniform fine grain and good toughness without quenching distortion; typical pre-machining condition for forgings. | 560 | 835 | 22 | 23 HRC | 7.6 % IACS |
Cold Finished (Cold Drawn Bar) | Cold-drawn/turned-ground-polished 1330 Mn-alloy bar: ~10–20 % strength gain over hot rolled with tight size tolerance and good machined finish, but reduced ductility and residual stress. | 585 | 705 | 13 | 202 HB | 44 W/m·K |
Normalized and tempered | Used on large sections where full quench is impractical; moderate strength with high ductility. | 640 | 760 | 23 | 18 HRC | 7.8 % IACS |
Cold rolled | Pick for close tolerance, bright finish and higher as-supplied strength on shafting and fastener stock. | 690 | 800 | 12 | 235 HB | — |
Quenched and tempered | Choose quenched and tempered near 540 °C (≈26–30 HRC) as the general-purpose condition for shafts and bolts needing about 900 MPa tensile strength with good toughness and 18% elongation. | 830 | 910 | 18 | 27 HRC | — |
Quenched and tempered ~425 °C | Pick the ~425 °C temper at 33–38 HRC for heavily loaded bolts, pins and gear blanks requiring about 1145 MPa tensile strength; ductility and machinability fall against the higher temper. | 1,085 | 1,145 | 15 | 36 HRC | — |
Quenched and tempered ~315 °C | Maximum practical strength level for 1330; wear-and-strength parts where notch toughness is secondary. | 1,315 | 1,420 | 9 | 43 HRC | — |
What is 1330?
1330 (UNS G13300) is a low-alloy manganese steel of about 0.30% C with 1.75% Mn, used as a through-hardening bar and shaft grade; typical values are 415 MPa yield, 690 MPa tensile, 20% elongation and 197 HB. It offers better hardenability than plain carbon steel of similar carbon content at modest cost and is available hot-rolled, cold-finished, annealed, normalized, N&T and Q&T to 33–38 or 40–45 HRC. Machinability is moderate at roughly 60% of 1212, there is no inherent corrosion resistance, and the high manganese content demands preheat and post-weld tempering. 4130 or 4140 are the usual alternatives for larger sections or higher hardenability. 1330 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,425°C (2,597 °F). 1330 has a yield strength of 415 MPa (60.2 ksi) and a tensile strength of 690 MPa (100 ksi) — weaker than 56% of steel grades. Elongation at break is 20% and the elastic modulus is 205 GPa (29.7 Msi).
What is 1330 used for?
- Drive shafts
- Industrial gears
- Bolts
1330 properties
Typical room-temperature values for 1330-HR; bars are the position among steel grades.
Physical3
1330 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,425°C (2,597 °F).
Mechanical17
1330 has a yield strength of 415 MPa (60.2 ksi) and a tensile strength of 690 MPa (100 ksi) — weaker than 56% of steel grades. Elongation at break is 20% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
1330 is rated for continuous service to 400°C (752 °F). It conducts heat at 44 W/m·K (25.4 BTU/hr·ft·°F), better than 57% of steel grades. Thermal expansion is 12.2 µm/m·K (6.78 µin/in·°F).
Electrical3
1330 conducts electricity at 7.8 % IACS, worse than 57% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (11/100), worse than 73% of steel grades.
Sustainability4
Producing a kilogram of 1330 takes about 25 MJ of energy and emits 2 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 25%.
Manufacturability7
1330's machinability is good (58/100, better than 75% of steel grades); weldability fair (45/100); formability fair (45/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the steel family
Yield strength against density for every steel grade FabDigit runs. 1330 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1330
Is 1330 easy to machine?
Machines like a medium-carbon steel at ~60% of 1212; best in annealed/normalized state with rigid setups, carbide tooling and copious coolant — the high Mn makes chips gummy and work-hardening prone above 300 HB.
Can 1330 be welded?
Weldable with low-hydrogen electrodes but C≈0.30 plus 1.75 Mn gives high hardenability: preheat 200–300 °C, control interpass, and stress-relieve or re-temper after welding; avoid welding in the fully hardened condition.
Can 1330 be formed, bent or molded?
Hot forge 1100–1200 °C and finish above 900 °C, then normalize; cold bending only in annealed condition with generous bend radii (≥2.5 t).
Manufacturability
The process limits FabDigit applies to 1330. Every 1330 part is priced by an engineer; design inside these and the quote comes back without a redesign loop.
CNC machining
| Machinability | Better58 / 100 |
|---|---|
| ISO material group | P.2 |
| Cutting speed (rough / finish) | 180 / 210 m/min |
| Minimum wall | 0.8 mm |
| Minimum internal radius | 1 mm |
| Drill depth limit | 5× diameter |
| Best surface (machined / polished) | Ra 1.6 / — |
| Hardenable after machining | No |
Sheet metal
| Formability | Fair45 / 100 |
|---|---|
| Weldability | Better45 / 100 |
1330 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| CSAE J404 heat analysis | 0.28 – 0.33 | 0.3 |
| Mnprimary alloying element of 13xx series | 1.6 – 1.9 | 1.75 |
| Si | 0.15 – 0.35 | 0.25 |
| P | ≤ 0.04 | |
| S | ≤ 0.04 | |
| Fe | balance |
What surface finishes work on 1330?
No natural corrosion protection — specify zinc or zinc-nickel plate (bake for hydrogen relief above 320 HB), manganese phosphate + oil, black oxide, or primer/paint; polishes to a good bright finish before plating.
Surface treatments FabDigit runs on steel parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Plating
CVD Coating
Black / Phosphate
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Steel 1330 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- G13300
How much does 1330 cost?
1330 is a standard-cost steel ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
1330 — frequently asked
What is 1330 used for?
1330 is typically used for drive shafts, industrial gears and bolts. In short: workhorse Mn-Mo bar.
What is the yield strength of 1330?
1330 has a typical yield strength of 415 MPa (60.2 ksi) and a tensile strength of 690 MPa (100 ksi) — weaker than 56% of steel grades. Strength varies by condition: see the 9 listed tempers.
Is 1330 easy to machine?
Reasonably — machinability is rated good (58/100, better than 75% of steel grades). Machines like a medium-carbon steel at ~60% of 1212; best in annealed/normalized state with rigid setups, carbide tooling and copious coolant — the high Mn makes chips gummy and work-hardening prone above 300 HB.
Can 1330 be welded?
With care — weldability is rated fair (45/100). Weldable with low-hydrogen electrodes but C≈0.30 plus 1.75 Mn gives high hardenability: preheat 200–300 °C, control interpass, and stress-relieve or re-temper after welding; avoid welding in the fully hardened condition.
What surface finishes work on 1330?
No natural corrosion protection — specify zinc or zinc-nickel plate (bake for hydrogen relief above 320 HB), manganese phosphate + oil, black oxide, or primer/paint; polishes to a good bright finish before plating.
Can 1330 be formed, bent or molded?
Hot forge 1100–1200 °C and finish above 900 °C, then normalize; cold bending only in annealed condition with generous bend radii (≥2.5 t).
What is the maximum service temperature of 1330?
1330 is rated for continuous use to about 400°C (752 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 1330-HR and 1330-CR?
HR is the default condition — cheapest stock condition for parts that will be machined and then heat treated by the fabricator. CR: pick for close tolerance, bright finish and higher as-supplied strength on shafting and fastener stock. Yield strength is 415 MPa in HR versus 690 MPa in CR.
How much does 1330 cost?
1330 is a standard-cost steel ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Can FabDigit make parts in 1330?
Yes — 1330 is available for CNC machining and sheet metal; every part is priced by an engineer rather than instantly. Upload a STEP file to get a price and a DFM check.
Sources
- SAE J404 — Chemical Compositions of SAE Alloy Steels — SAE International (2021)
- ASTM A29/A29M — General Requirements for Steel Bars, Carbon and Alloy, Hot-Wrought — ASTM (2020)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.4 — Heat Treating — ASM International (1991)
- Machinery's Handbook, 31st ed. — Industrial Press (2020)
- GB/T 3077 (30Mn2 near-equivalent) — SAC / (2015)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.